Improvement in steam-boilers



W. C. WOLFE. Steam-Boilers.

umh in Ilm r I i ilk UNITED STATES l'DA'r-nrrrv OFFICE.

WILLniM e. worum, oF Jenner-OWN, PENNSYLVANIA.

IM PROVEM ENT IN STEAM-BOI LERS- Speciiication forming part of Letters Patent o. 206,408, dated July 30, 1878; application tiled May 18, 1878.

To all whom it may concern Be it known that I, NVM. C. WOLFE, of Johnstown, in the county of Cambria and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference bein g had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in steamfboile'rs; and it consists in the construction and arrangement of parts whereby the greatest amount of heating-surface is obtained within the smallest amount of space, a saving made in fuel, steam more rapidly generated, and power increased in the boiler, all of which will be more fully described hereinafter.

The accompanying drawings represent my invention.

a represents the base ot' my boiler, which.`

By this arrangement a crevice is left'all round the grate, which increases its surface, and permits it lto be shaken or the fire stirred by means of a poker inserted in the aperture in the downward-projecting lug on the under side of the grate 5 or, if desired, the grate and fire may be instantly removed through the ashchamber.

Upon the top of the water-pipe c, to which is connected the water-supply pipe and discharge-cock, are secured a number of vertical water-pipes, g, placed all around the fire-chamber and inclosing or forming it. A small space is left between the pipes to permit a free circulation of heat around them and allow access of hot air. to the burning fuel. At the above the level of the door in large boilers,

and just below it in small ones, there is a short horizontal water-pipe, 1f, of the same shape as Athe one c, and extending upward from this pipe j' are shorter pipes g.

By this construction it will be seen that,'\ vith the except-ion of the small space taken up by the door, there is no heating-surface lost, and that the pipes are connected uninterruptedly together, so that the circulation of water is perfect and complete.

Theupper ends of these water-pipes g are connected with the body h ot' the boiler, up through which the nues t' pass. Ihe lower ends of these ilues are pressed through the npper head and screwed into the lower head, their upper ends being expanded, so as to form a tight joint with the upper head.

As the draft will be much greater through the dues nearest to the stack, if allowed to pass uninterruptedl y upward, the cap or hood is placed over the tops of those lues that are nearest to the stack. As this hood prevents the products of combustion from escaping so freely through them, the heat is forced to escape Vequally through all the tlues, and thus the water is heated uniformly throughout.

The water-tubes g may be secured in position by means of the extension socket and n oz- 'zle 7, having an internal screw-socket to receive the end of the pipe and an external screw-thread toscrew into the crown-sheet or annular chamber c, which arrangement permits their separate removal and insertion after repairing or cleaning. The tubes are `short enough to pass between the boiler-heads, and have'along thread cut on one end, which can be screwed far enough through one head to admit the insertion of the socket and nozzle at its opposite end, when the tube may be locked and-screwed into it. Should the threads not meet properly the socket maybe turned, which, having a different pitch of thread from the nozzle, will correct the difference of the tribes. This socket is alternately placed at top and bottom'of the tubes to permit a closer arrangement. These tubes may also be placed in the molds and cast in the iron permanently.

The body-h or steam-chamber is so constructed as to admit the insertion into its side of a gage, gage-cocks, or other attachments, and a fusible plug in its lower head, together with a steam-gage, safety-valve, or other fittin gs in its upper head.

Around the tubes or pipes g and steamchamber is placed a sheet-iron casing, l, which is made in two sections and connected t0- gethcr at the lower end of the steam-chamber. By removing the lower section ready access is givenv to the tubes g for cleaning or repairing them.

The upper head ofthe boiler is surmounted by a plate, n, which forms a covering for the boiler and base-plate for the engine, which is to be placed thereon, and is provided with a smoke-nozzle, m, into which the exhaust-steam from the engine is discharged if desired to increase the draft.

A hot-air space or chamber, p, is formed all around the steam-chamber inside the casing, and extends to the bottom of casing and pipe c. This hot-air space prevents radiation of heat from the steam-chamber and interior of the boiler, and protects the outside casing from any injurious effects of heat, and also permits the feed-water and steam-pipe to pass through it, preserving a neater appearance and preventing condensation of steam.

The top of the boiler or plate n forms a base for the engine when placed thereon, as shown in dotted lines, and the bottom of a heater or chamber, s, formed in the base of the engine, through which the feed water is forced or drawn by means of a pump attached to the engine. The water, while passing through this chamber, is heated while resting on the plate, which is kept hot by the heat against its under side before escaping up the pipe. The water-supply pipe leads from the base of the boiler up through the hot-air chamber, then through a pump into the heater, andis provided with the necessary check-valves. The delivery-pipe leads from the surface of the water, where it is hottest, to the bottom of the casin g, and discharges into the pipe entering the pipe c on its lower surface, and it carries also the dis` charge-cock, which permits the sediment being blown out at its lowest point. A horizontal check-valve is placed at the junction of the delivery-pipe and the discharge-pipe.

An exhaust-pipe, o, leads from the engine to the smoke-nozzle, where it intersects a vertical exhaust-pipe, o', inside the casing, into which it discharges, and may be directed up into the smoke-stack to increase the draft, or down through the base by means of a suitable halfrouud valve placed at the point of intersection of the two pipes. To the lower end of this eX- haust-pipe o is attached a horizontal branch, t, extending under the grate, by which a vapory blast may be delivered on the fire, if desired. Any condensed steam or drainage from the exhaust may be also carried 0E through this vertical pipe, which would otherwise bev injuriously discharged into the smoke-stack. A short steam feed-pipepasses up from the boiler to the induction part of the engine.

The boiler is also provided with a draftdamper in the smoke-stack and a mica door. A register will be placed at the bottom of the chamber o on the base inside the case to permit the escape of ashes working into this space from between tubes or from the fire-chamber, vand to afford a greater supply of air to -ihe fuel, if necessary.

In the larger boilers I propose to use doors fitted with draft-registers in the ash-pit instead 0f the ash-drawer described.

Having thus described my invention, I claimy l. A vertical tubular steam-boiler consisting of the combination of the upper portion, h, through which the ilues z' pass, a single row of vertical pipes, g, inclosing the firechamber, the horizontal annular chamber c surrounding the grate, and an outer inclosingcase, l, having its lower portion made removable, substantially as shown.

2. The combination of the tubes g, extension-sockets 7, chamber c, and crown-sheet, the sockets having an internal screw to receive the end of the pipe and an external screw-thread to screw into the annular chamber c or crownsheet, whereby each tube maybe independently removed and replaced, substantially as described.

3. In combination with the boiler, substan- I tially as herein described, the exhaust-pipe running from the engine through the boiler, and provided at its upper end with a nozzle for increasing the draft in. the uptake and at its lower end with a horizontal perforated projection, whereby a jet of steam is supplied and mingled with the air under the grate for the better combustion of the fuel, said pipe being provided with suitable cocks, substantially as set forth.

In testilnouythat I claim the foregoing I llave hereunto set niy hand this 30th day ot' April, 1ST S.

VILLIAM '(3. VOLFE.

Titnesses Jol-1N HENDERSON, Jox-1N WIDMANN. 

